Improvement in fruit-jars



LL. MASON.

improvement in Fruit-Jars.

Jm. MIZ- axon ration..

Unrrnnsrerns To all whom it concern:

Be it known that I, JOHN L. MAs0N,; of the vented anew and useful Improvement in Fruit- -`Jars;` and Idolhereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying` drawing forming part of this specification, in which drawing- Figure l is a `v ertical cross-section of my y improvement; Fig. 2 is an outside elevation; and Fig. 3 isa top view, showing a wrench applied to the screw-ring for the purpose of opening or closing the jar.

Similar letters indicate corresponding parts. This invention relates to fruit-jars; and it consists in forming the joint of the jar which receives the cover of two or more annular ascending steps or terraces containing three 'such' terraces risinguone above the other in different` planes `toward the top or mouth of the jar. That part of the cover which rests `upon the terraced shoulder is also made with annular steps or terraces, but in` the reverse order-that is to say, in a descending seriesand in such a manner that the edges of its steps vor terraces overlap or extend, in a vertical line beyond the edge of the step or terrace just below or opposite to it on the shoul- .der ofthe jar. The impinging edge of the `outer `or lower step of `the cover comes over y the lower or outerstep of the jar-shoulder. A rubber gasket or ring being placed upon the terraced shoulder and the cover brought down i `npon it, the gasketis made to conform to the shape of the surfaces between which it is conned, and is bent or forced down bythe descending series of terraces of the cover over the edges i of the successive steps on the jar, so aste coniine the gasket by means of several successive bearings, which are independent ot'each other. The terraces of the jar and cover are in this example circular, but they can be made of different outlines. `The `cover is confined to the jarby means of a screw-ring, and the outside of such ring `is provided with a projection of the `character described in my Letters Patent No. 115,754, and such projection forms a holdfast for a wrench in screwing and unscrewing the ring.

' Myinvention is shown in the annexed drawf .Ton-n L. Mnson, on. new vonk, lN. fr. j

i city, county, and State of New York, have in# lMPRovEMEN-r IN FRUIT-JARS.

Specication forming part of Letters Patent N o. 131,695, dated September 24, 1872.

ing, where the letter A designates 'a jar having a shoulder formed of successive steps or terraces,`B, three in number in the present example, the uppermost terrace being far enough below the top or mouth of the jar to allow the rubber gasket to be properly placed and held around the mouth upon the shoulder. rlhe cover C has on its bearing-edge a descending series of steps or terraces, D, which are arranged to overlap the terraces B of the jar in such a manner that the rubber gasket E is bent down over the edge of the topmost terrace of the jar by the edge of the second terrace (reckoning from above) of the cover, and so on to the bottom terrace of the jar, where the lower terrace ofthe cover, which is made narrower than the upper ones, impinges on that portion of thegasket which lies upon lthe bottom terrace or plane of the jar, as is illustrated in the drawing. The cover is confined to the jar by a screw-ring, F, which screws upon a thread formed on the jar below its shoulder, the top of the ring being made with an inner ange which rests on the top of the cover around its edge, as is described in my Letters Patent No. 102,913. rlhe outside of the screw-ring is provided with a knob or projection, G, which serves as a convenient holdfast for a wrench, H, which is curved to fit the periphery of the ring, and whose end is formed with a lip, I, that grasps the projection and prevents the wrench from slipping when one isscrewing the ring on or off the jar.

My improved joint can be used on jars and covers of any material; but in this example I have shown the invention applied to a glass jar and cover, which I make in the usual inanner by blowing the jar in a mold and pressing the cover, the jar-mold being suitably constructed so as to form the different stepsfof the joint on the shoulder, which, as they areV inv different planes one above the other, do not prevent the opening of the mold in order to take ont thejar.

I do not restrict myself to any particular bination with cover C formed at its bearingedge with a series of descending terraces, D, said cover C being confined in its seat by a screw-ring, F, meshing into screw-threads formed on the body of the jar beneath the gasket-seat, substantially as and for the purpose specified.

2. `The gasket arranged between the ascending and deseendin g series of steps on the cover O and jar A, in combination with each other e i v .131,695

and with the confining screw-ring F, as set forth, whereby the gasket is confined by means of several successive bearings independent of each other, as specified.

This specification signed by me this 9th day of August, 1871. f

JOHN L. MASON.

Witnesses: t

C. WABLERS, E. F. KASTENHUBER. 

